Preparation and evaluation of polyurethane/cellulose nanowhisker bimodal foam nanocomposites for osteogenic differentiation of hMSCs

Shahrousvand, Ehsan; Shahrousvand, Mohsen; Ghollasi, Marzieh; Seyedjafari, Ehsan; Jouibari, Iman Sahebi; Babaei, Amir; Salimi, Ali

doi:10.1016/j.carbpol.2017.05.027

Cited by 47 publications

(22 citation statements)

References 42 publications

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“…Recently, nanocomposite technology has quickly become an interdisciplinary knowledge as it has a prominent role in the improvement of the biomedical engineering applications particularly tissue engineering . In recent years, polymer nanocomposites, which can be easily designed, have been widely utilized in the biomedical applications …”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of reinforced poly (ε‐caprolactone) nanocomposites by cellulose nanowhiskers

2019

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In the present work, cellulose nanowhiskers (CNWs) were extracted from cellulose microfibers powder (CMP) and employed as reinforcement in poly-(ε-caprolactone) (PCL). The biocompatible and biodegradable PCL/CNW nanocomposites reinforced by CNWs in various weight percentages of 0, 0.1, 0.5, and 1 wt% were prepared via solvent casting. The morphology of cellulose microfibers and CNWs were evaluated via the optical microscopy, scanning electron microscopy, and transmission electron microscopy. The mechanical, thermal, and rheological properties of PCL/CNWs film nanocomposites were then investigated. The biodegradability and hydrophilicity of PCL/CNWs were improved by increasing the CNWs content. By adding higher loadings of CNWs, the nanocomposite samples showed higher tensile moduli because of the reinforcing effect of CNWs. The linear viscoelastic properties of PCL was not significantly changed with different loadings of CNWs. K E Y W O R D Scellulose microfibers powder (CMP), cellulose nanowhisker (CNWs), film nanocomposite, poly (ε-caprolactone), viscoelastic measurements

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Section: Introductionmentioning

confidence: 99%

“…CNWs were obtained from the cellulose microfibers as we described in our previous reports . The waste paper powders (10 g based on dry weight) were dissolved in 190 mL of phosphoric acid solution (85 wt.%), and hydrolyzed under vigorous agitation at 80°C for 30 min.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of reinforced poly (ε‐caprolactone) nanocomposites by cellulose nanowhiskers

2019

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“…In particular, compared to the SP‐PU, the diffraction peak intensity of SP‐D‐PU shows further decreasing tendency with α‐helix peak nearly disappearing. It clearly indicates that the catechol groups of the D‐PU not only accelerate the optimization of interactions between the PU and SP, but also further contribute to the improvement of the interior microphase‐separated structure in the SP‐D‐PU resin …”

Section: Resultsmentioning

confidence: 98%

Designing Biomimetic Microphase‐Separated Motifs to Construct Mechanically Robust Plant Protein Resin with Improved Water‐Resistant Performance

Zhao

Zhong

Pang

et al. 2020

Macro Materials & Eng

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Plant protein, as a sustainable alternative to petroleum‐derived resin, has exhibited notable potential for engineering wood products without formaldehyde emission, while the poor mechanical and water‐resistant performances limit its practical applications. Inspired by mussel chemistry and structure, a dopamine‐functionalized polyurethane (D‐PU) elastomer is synthesized in this work acting as a bio‐inspired crosslinking unit to improve the properties of soy protein (SP) resin. It is found that the catechol groups of the incorporated D‐PU not only triggers polyurethane to interact with SP matrix giving rise to a stable crosslinking network with excellent load‐bearing capacity, but also serves as a water‐resistant barrier to reduce the water erosion effect on resin. Moreover, a desired microphase‐separated morphology is observed within the continuous protein phase after introducing D‐PU. The microphase‐separated structure simultaneously strengthens and toughens SP adhesive layer, thus achieving high‐efficiency stress transfer and energy dissipation as well as accelerating SP to further permeate into the substrate forming more mechanical adhesion nails. As a result, the modified SP‐D‐PU resin presents an impressive improvement in dry and wet adhesion strength up to 70.5% and 133.9% compared to the pristine SP resin, respectively. The proposed biomimetic design may offer a workable strategy for preparing of high‐performance bio‐based composites.

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“…Polymeric foams are interesting materials due to their many advantages, such as low density, light weight, high specific strength, reduced material consumption, enhanced thermal stability, good sound isolation and low thermal conductivity . Because of these characteristics, polymer foams are utilized in a wide range of applications, including packaging, buoyancy, thermal insulation, acoustic attenuation and vibration damping etc …”

Section: Introductionmentioning

confidence: 99%

Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

Jamalpour

Ghaffarian

Jangizehi

2018

Polymer International

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In this study, we report the fabrication of supramolecular polymer nanocomposite foams with a uniform cell structure, high cell density and high expansion ratio using a soft matrix of poly(methyl acrylate-co-2-hydroxyethyl methacrylate) and silica nanoparticle fillers, both functionalized with ureido-pyrimidinone (UPy) supramolecular groups. Microcellular structures were formed using a batch foaming process at 90 ∘ C under a 9 MPa nitrogen atmosphere. Nanocomposites were characterized and compared before and after the foaming process to investigate the effect of supramolecular interactions on the thermomechanical properties and morphology of the foams. TEM images revealed that while strong inter-filler supramolecular interactions do not have a positive effect on their dispersion state, matrix−filler interactions derived from hydrogen bonding UPy motifs result in a rather uniform distribution of nanoparticles. Competing filler−filler and matrix−filler supramolecular interactions can be balanced and optimized by adjusting UPy populations along the chains and on the surface of nanoparticles. At a given chain functionality, increasing the nanoparticle loading up to an optimum concentration improves the mechanical properties and formability of the system. Above such concentration strong interactions between fillers, which are not compensated by the matrix, result in large aggregates and consequently undermine the material performance. Supramolecular polymer foams illustrate a similar thermal and viscoelastic behavior to that of neat samples but after foaming, due to the formation of a cellular structure and rearrangement or dissociation of UPy dimers under the foaming conditions, the elastic modulus is reduced.

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Preparation and evaluation of polyurethane/cellulose nanowhisker bimodal foam nanocomposites for osteogenic differentiation of hMSCs

Cited by 47 publications

References 42 publications

Preparation and characterization of reinforced poly (ε‐caprolactone) nanocomposites by cellulose nanowhiskers

Preparation and characterization of reinforced poly (ε‐caprolactone) nanocomposites by cellulose nanowhiskers

Designing Biomimetic Microphase‐Separated Motifs to Construct Mechanically Robust Plant Protein Resin with Improved Water‐Resistant Performance

Effect of matrix−nanoparticle supramolecular interactions on the morphology and mechanical properties of polymer foams

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